Improved steam-generator



NITED 'STATES PATENT Critica,

WILLAM CREED, OF BOSTGN, MASSACHSET'IS.

IMPRQVED STEAM-G EN ERATOR.

Specification forming part of Letters Patent N o. 534, dated December26, 1837.

To all whom, it may concern.-

Beit known that I, WILLIAM CREED, of Boston, 1n the county of Suffolkand Commonwealth of ll/Iassachusetts,have invented anew and usefulImprovement in the Steam-Boiler which I call Creeds PatentSteam-Generator, and I do hereby declare that the following is a fulland exact description.

The improvement consists of the following parts, viz:

Reference being had to the drawing, y is a cast-iron head, being aportion of a globe made fast to the shell orouter casting (marked A andB) and east with holes or sockets to receive theiends of the tubes,(marked 17,) said holes `to be largest 'at the bottom and taperinggradually to the top, and to be of a number and size corresponding tothe number and size of the tube, as hereinafter described, and said headmust be of proper size and thickness, according to the power of theengine required. The tubes to be inserted into the head y are for theconducting of fire, heat, and smoke, and are cast of iron in one entirepiece, communicating together in a neck at the top, which neckcommunicates with the box or drum C. The number of tubes thus casttogether may be three, four, or more, according to the size of theboiler, and are fixed in sets from near the center outward, beingsmaller toward the center and increasing in size toward thecircumference in the proportion drawn iu that part of the drawing markedPlan of cast-iron head and Section from A to B one-quarter size. Thebottom of the tubes is .cast bell-mouthed of such size that the bottomof the bell will enter from above at the top of the holes in the head,and above the bell-shaped part is a flange or nest for the tubes, whichmore than covers the top Qf the holes in the head. The tubes, beinginserted into the head, are to be firmly secured by iron or anyfire-proof cement, Well calked up from belowto the anges 011 the tubes.The form of the bottom of the tubes and the holes with the spaces toreceive cement (marked or) are shown in that part of the drawing markedsection from A to B. The sets of tubes thus cast together and fastenedinto the head at the bottom and fixed to the box or drum at the top bysecuring the necks with a ange and common lead joint made fast by Vfourbolts or screws, (marked l 1 l in the drawat their upper ends, so as toform one common orifice at b4, where they are connected to the drum C bya fiange and screws. The head is secured by bolts to the outer shell orcasing, so that in case'of cracks or accidental injury it may be easilytaken out and replaced. The

.box or drum C is of cast-iron in the proportion of No. l and No. 3 inthe drawing and hollow in the center, with a hole in the top of a propersize to receive the funnel d, and with holes to receive the necks of thetubes, which holes run from the circumference into the cavity in thecenter. There are in the topof the box or drum two man-holes (marked71,) for the convenience of clearing away soot or other obstructions, orfor placing or removing` the tubes, as hereinafter described. Should anyone of the tubes or the whole set become damaged by long use oraccident, they may be removed by a person entering the manhole Z of thewhole boiler or shell and the man-hole 71 of the box and screwing offthe bolts l l l which confine the necks of the tubes by anges, and thenthe cement of the bottoms being cut out or the bottoms being broken offthe set of tubes may be turned onequarter round and drawn out at theman-hole Z, and another set may be put in itsplace in the same lnanneras at first, when the repair will be complete.

The smoke-funnel (marked d) has two joints of cast-irou of an oval form,in order to give room each side for the man-holes of the box. One jointis fastened -by a fiange to the box and turns, as in the drawing, to theinner side of the shell or outer case, where it meets it with a ange.The other joint has a flange to match that of the first joint, and theyare to be bolted together through the shell, which is cut to allow theescape of the smoke. The second joint then turns upward, so thata'sheetiron ue may be affixed to it perpendicularly,

and the sheet-iron may be con lined to the joint, either bya flange orany closeshuttin g joint, as may be convenient.

rlhe remaining parts of a complete boiler are of the common form wellknown to all competent steam-engine builders.

A B is the case or shell containing the water below around the tubes andthe steam above the water-liue.

Z is the man-hole at the top of the boiler.

: is the steam-pipe and safety-valve.

g g g are th ree gage-cocks at different levels to ascertain the heightot the Water.

m is the feed-pipe running through the side of the shell and turningdown in the center between the sets of tubes to a proper distance fromthe bottom. i

o is a bottom man-hole for cleansing and repairing.

q is the furnace-door.

p is the furnace.V

fr is the bars or grating upon which the fuel is thrown.

u is the grate or sitter for ashes.

t is the ash-pit.

n in No. 2 is a valve for admitting cold air.

on in No. l is the blow-01T pipe or cock.

s is a soapstone or any other fire-proof lining for the furnace.

e is the soot-door for cleansing' the funnel.

I is the damper in the funnel.

By reference to the drawing, which is a part of this specification, ttewhole construction, arrangement, and adapt-ation of the different partswill be immediately understood by any person versed in this branchofmechanics.

The advantages and characteristics of this improved steam-generator areas follows: It is simple in its construction, easily built, and

easily repaired by having extra sets of tubes at hand. It is cheap, theextra work and materials over a plain boiler being but trifling. Itisdurable, for, being` of cast-iron of adequate thickness, it will notsoon burn out, is not injuriously affected from its form by expansiouand contraction, nor will it be liable to bursting, breakage, orcollapse. It is adapted for any kind of fuel-wood or soft coalbut iscapable of being used to peculiar advantage With hard coal. lt exposes alarge surface of heated metal to the Water, and in all other respects isas simple, plain, and safe as a common boiler. It is portable, for fromits construction upon arches of cast-iron, (not heretofore mentioned,but shown in the drawing,) without the expense of brick-work or extraconstruction, the boiler can be moved Jfrom one place to another, in abuilding or boat, with little expense or inconvenience, and withouttaking it in pieces.

The improvement desired to be secured by Letters Patent consists inconstructing of two or more tubes in sets of one piece, uniting at theirupper ends in one common orifice, where they are connected with a drumterminating in a smoke-pipe, the whole being constructed, combined, andarranged substantially in the manner herein described. g

In testimony whereof I, the said WILLIAM `CREED, hereto subscribe myname, in the presence of the Witnesses whose names are heretosubscribed, on the 4th day of December, in the year of our Lord 18257.

WILLIAM CREED.

Vitnesses:

CHAs. H. LocKn, A. MOORE.

